Good day experts,
We are interested in using the WS6318. From the technical manual I notice that there is a PCM digital audio interface. The WS6318 also supports 4 GSM audio codecs (HR, FR, EFR, AMR).
I have the following questions:
Is it possible to somehow force the WS6318 to select a particular GSM audio codec or is this only selected by the network operator?
Assuming that the EFR audio codec will be used in most cases if both the end-to-end devices are only 2G compatible (e.g. two WS6318 modules calling each other), would it be possible to sync the PCM digital audio with the EFR audio codec’s frames? In other words, the EFR codec encodes speech in 20ms frames of 160 samples, can I somehow determine where those 20ms/160 sample boundries are and pack my PCM samples exactly according to those boundries?
Thanks in advance!